Alcatel-Lucent Alcatel-Lucent Certifications 4A0-106 Questions & Answers

• Question 21:

  Click the exhibit.

  

  The AS-override method is used to prevent BGP loops in the blue customer VPRN. Which statement about the configuration is TRUE?

  A. the configuration is complete and correct.

  B. 'as-override' should be configured under the BGP context.

  C. 'as-override' should be configured under the group context.

  D. 'as-override' should not be part of this configuration.

  Correct Answer: D

• Question 22:

  Which of the following about inter-AS model B VPRN is FALSE?

  A. Model B does not require the configuration of VPRN instances on ASBRs.

  B. The ASBRs peer with each other to transport VPN-IPv4 routes between autonomous systems.

  C. PE routers distribute VPN-IPv4 routes to their local ASBR.

  D. One single ASBR is required in each AS to hold the routes for all VPRNs.

  Correct Answer: D

• Question 23:

  A VPLS spoke SDP is terminated on a VPRN service. The remote side of the spoke SDP is operationally "Down" with a flag of "Service MTU Mismatch". Which command can you use on an Alcatel-Lucent 7750 SR to show the signaled operational VC-MTU?

  A. show service id base

  B. show router ldp bindings

  C. show service id sdp detail

  D. show service id vc-mtu

  Correct Answer: B

• Question 24:

  Click the exhibit.

  

  For the CE hub and spoke VPRN, which of the following is FALSE?

  A. The primary VRF on PE1 contains routes learned from spoke sites.

  B. All traffic between spoke sites must pass through CE1.

  C. The secondary VRF on PE1 is used to route data packets from the hub CE to the spoke sites.

  D. PE1 advertises the primary VRF routes to CE1.

  Correct Answer: C

• Question 25:

  Based on the VPRN BGP decision process, which of the following routes is selected first?

  A. The route with the shortest AS path.

  B. The route with the lowest route or tunnel table cost to the NEXT_HOP.

  C. The route with the highest local preference.

  D. The route with the lowest originator ID or BGP identifier.

  Correct Answer: C

• Question 26:

  In a Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT a benefit to the network provider?

  A. The solution scales as the number of VPNs offered by the customer carriers increases.

  B. The solution scales as the number of end-customer routes increases.

  C. There is no need to manage end-customer services.

  D. The solution scales as the number of serviced customer carriers increases.

  Correct Answer: D

• Question 27:

  Click the exhibit.

  

  A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customer carrier who is an Internet Service Provider (ISP). Which of the following configuration steps is NOT required?

  A. Configuring labeled eBGP sessions between CSC-CE and CSC-PE routers.

  B. Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.

  C. Configuring labeled iBGP sessions between PEs residing in different customer carrier sites.

  D. Advertising the received system addresses of remote PEs using either iBGP or IGP/LDP within each customer carrier site.

  Correct Answer: C

• Question 28:

  Click the exhibit.

  

  A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customer carrier offering VPRN services. Which of the following configuration steps is NOT required?

  A. Creating an export policy on CSC-CE1 and CSC-CE2 to advertise local PE addresses to the network provider.

  B. Configuring eBGP between CSC-CE and CSC-PE routers; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

  C. Configuring iBGP between PE and CSC-CE within each customer carrier site; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

  D. Configuring MP-iBGP between PE1 and PE2; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

  Correct Answer: D

• Question 29:

  In inter-AS model C VPRN, which of the following about the command "advertise-label ipv4" is TRUE?

  A. This command is required on all PE routers to distribute labeled IPv4 routes directly to PEs in remote AS.

  B. This command is required on the ASBRs to exchange labeled IPv4 routes between the ASs.

  C. This command is required on the route reflectors to exchange customer routes between ASs as labeled IPv4 routes.

  D. This command is required on all PE routers to distribute labeled IPv4 routes to connected CEs.

  Correct Answer: B

• Question 30:

  Click the exhibit.

  

  For the inter-AS model B VPRN, which of the following is TRUE when CE2 sends an IP packet to 192.168.1.1?

  A. PE2 pushes one label on the IP packet and forwards it to ASBR2.

  B. ASBR2 sends the IP packet with one label to ASBR1.

  C. ASBR1 sends the IP packet with one label to PE1.

  D. PE1 pops one label off the IP packet and forwards it to CE1.

  Correct Answer: B